whatever happened to jimmy hoffa? the mess tri of the former teamster boss' disappearance may soon be solved. as mark barger reports, investigators spent the day digging for new evidence that could solve this cold case. >> reporter: one of the coldest of cold cases brought a commotion to patricia's house near detroit today. >> i was told a dead body might be buried in my backyard. >> reporter: not just any body, but that of jimmy hoffa, one-time boss of the teamsters, america's biggest union. he disappeared without a trace more than 37 years ago. a decade before patricia bought her home. >> he is the best-known dead body that they've been looking for for years. >> reporter: hoffa's connections to organized crime had spurred numerous theories about his disappearance in july of 1975. earlier this year, an informant told hoffa wars author he saw a body being buried at this suburban home around the time hoffa vanished. >> he's adamant about his beliefs hoffa is buried at this location. >> reporter: he pointed the informan